My babies are halfway through flowering but i am noticing a lot of very small flies, they dont seem to be doing any harm. I am willing to ride it out this time and not do anything, but once it has finished i do not want it to happen again on the next one. What can i do when the room is free of plants to kill any left over nasties? I have heard of a 'bug bomb,' has anybody had results with this or a similar product? What causes these flies? the intake was un-filtered to begin with but now i have a tight on the end which stops anything coming in, could that be what caused the flies? I am also seeing a few tiny flies flying around my clones so can someone suggest a product i can submerge them in before they go in the main room to get rid of any potential nasties? All feedback is welcomed, cheers.